TypeError: Cannot read properties of undefined (reading 'strings')

[Kadison]

I'm encorporating citeproc into a plugin for Obsidian, which uses TypeScript (if that's relevant). However, whenever I use updateItems() I get this error.

If anyone needs more context my repository is here: https://github.com/kadisonm/obsidian-reference-generator/tree/01607da92597b1679e617750714ddd243892955f

I can't really tell what I'm doing wrong. Is it something to do with typescript or my packages? I was getting this error earlier which I solved by making a types.d.ts file with:

declare module 'citeproc';

Here is my code: (also requestUrl() comes from the Obsidian api and is essentially fetch)

// Create CSL JSON
    const JSON = [{
        "id": "id",
        "type": "webpage",
        "title": title,
        'container-title': siteName,
        "URL": url,
        "author": authors,
        "issued": {
            'date-parts': [[ published.getFullYear(), published.getMonth(), published.getDate() ]]
        },
    }];

    // Create Citeproc Engine
    const sys = {
        retrieveLocale: async (lang: string) => {
            const response = await requestUrl('https://raw.githubusercontent.com/citation-style-language/locales/master/locales-' + lang + '.xml');
            const result = response.text;

            return result;
        },

        retrieveItem: (id: string) => {
            return JSON;
        },
    };

    const style = await requestUrl('https://raw.githubusercontent.com/citation-style-language/styles/master/' + styleID + '.csl').text;

    const engine = new CSL.Engine(sys, style);

    // Get reference in style
    engine.updateItems(['id']);

    const result = engine.makeBibliography();

    console.log(result);

    return "";

[Lars Willighagen]

I'm seeing two main things:

1. sys.retrieveLocale cannot be asynchronous, locales would need to be fetched beforehand. citeproc always requests en-US so that would need to be fetched at a minimum.
2. sys.retrieveItem should return the object, not the full array.

[Kadison]

Hi, I'll fix these and update soon. Thank you so much for such a fast response.

[Kadison]

It works thank you so much.